This part is solvable. They encrypt the data using 100,000 keys in 100,000 parts. You pay 1/100,000 the ransom and pick a key. You test. You get a random 1/100

This part is solvable. They encrypt the data using 100,000 keys in 100,000 parts. You pay 1/100,000 the ransom and pick a key. You test. You get a random 1/100,000 of your data back. Repeat. There would be better ways I'm sure.